text: /*
   *  Copyright (c) 2016, The OpenThread Authors.
   *  All rights reserved.
   *
   *  Redistribution and use in source and binary forms, with or without
   *  modification, are permitted provided that the following conditions are met:
   *  1. Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *  2. Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *  3. Neither the name of the copyright holder nor the
   *     names of its contributors may be used to endorse or promote products
   *     derived from this software without specific prior written permission.
   *
   *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   *  POSSIBILITY OF SUCH DAMAGE.
   */
  
  /**
   * @file
   *   This file implements the OpenThread CoAP API.
   */
  
  #include "openthread-core-config.h"
  
  #include <openthread/coap.h>
  
  #include "coap/coap_message.hpp"
  #include "common/instance.hpp"
  #include "common/locator-getters.hpp"
  
  #if OPENTHREAD_CONFIG_COAP_API_ENABLE
  
  using namespace ot;
  
  otMessage *otCoapNewMessage(otInstance *aInstance, const otMessageSettings *aSettings)
  {
      Message * message;
      Instance &instance = *static_cast<Instance *>(aInstance);
  
      if (aSettings != NULL)
      {
          VerifyOrExit(aSettings->mPriority <= OT_MESSAGE_PRIORITY_HIGH, message = NULL);
      }
  
      message = instance.GetApplicationCoap().NewMessage(aSettings);
  
  exit:
      return message;
  }
  
  void otCoapMessageInit(otMessage *aMessage, otCoapType aType, otCoapCode aCode)
  {
      static_cast<Coap::Message *>(aMessage)->Init(aType, aCode);
  }
  
  otError otCoapMessageInitResponse(otMessage *aResponse, const otMessage *aRequest, otCoapType aType, otCoapCode aCode)
  {
      Coap::Message &      response = *static_cast<Coap::Message *>(aResponse);
      const Coap::Message &request  = *static_cast<const Coap::Message *>(aRequest);
  
      response.Init(aType, aCode);
      response.SetMessageId(request.GetMessageId());
  
      return response.SetToken(request.GetToken(), request.GetTokenLength());
  }
  
  otError otCoapMessageSetToken(otMessage *aMessage, const uint8_t *aToken, uint8_t aTokenLength)
  {
      return static_cast<Coap::Message *>(aMessage)->SetToken(aToken, aTokenLength);
  }
  
  void otCoapMessageGenerateToken(otMessage *aMessage, uint8_t aTokenLength)
  {
      IgnoreError(static_cast<Coap::Message *>(aMessage)->SetToken(aTokenLength));
  }
  
  otError otCoapMessageAppendContentFormatOption(otMessage *aMessage, otCoapOptionContentFormat aContentFormat)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendContentFormatOption(aContentFormat);
  }
  
  otError otCoapMessageAppendOption(otMessage *aMessage, uint16_t aNumber, uint16_t aLength, const void *aValue)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendOption(aNumber, aLength, aValue);
  }
  
  otError otCoapMessageAppendUintOption(otMessage *aMessage, uint16_t aNumber, uint32_t aValue)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendUintOption(aNumber, aValue);
  }
  
  otError otCoapMessageAppendObserveOption(otMessage *aMessage, uint32_t aObserve)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendObserveOption(aObserve);
  }
  
  otError otCoapMessageAppendUriPathOptions(otMessage *aMessage, const char *aUriPath)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendUriPathOptions(aUriPath);
  }
  
  uint16_t otCoapBlockSizeFromExponent(otCoapBlockSize aSize)
  {
      return static_cast<uint16_t>(
          1 << (static_cast<uint8_t>(aSize) + static_cast<uint8_t>(Coap::Message::kBlockSzxBase)));
  }
  
  otError otCoapMessageAppendBlock2Option(otMessage *aMessage, uint32_t aNum, bool aMore, otCoapBlockSize aSize)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendBlockOption(Coap::Message::kBlockType2, aNum, aMore, aSize);
  }
  
  otError otCoapMessageAppendBlock1Option(otMessage *aMessage, uint32_t aNum, bool aMore, otCoapBlockSize aSize)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendBlockOption(Coap::Message::kBlockType1, aNum, aMore, aSize);
  }
  
  otError otCoapMessageAppendProxyUriOption(otMessage *aMessage, const char *aUriPath)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendProxyUriOption(aUriPath);
  }
  
  otError otCoapMessageAppendMaxAgeOption(otMessage *aMessage, uint32_t aMaxAge)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendMaxAgeOption(aMaxAge);
  }
  
  otError otCoapMessageAppendUriQueryOption(otMessage *aMessage, const char *aUriQuery)
  {
      return static_cast<Coap::Message *>(aMessage)->AppendUriQueryOption(aUriQuery);
  }
  
  otError otCoapMessageSetPayloadMarker(otMessage *aMessage)
  {
      return static_cast<Coap::Message *>(aMessage)->SetPayloadMarker();
  }
  
  otCoapType otCoapMessageGetType(const otMessage *aMessage)
  {
      return static_cast<const Coap::Message *>(aMessage)->GetType();
  }
  
  otCoapCode otCoapMessageGetCode(const otMessage *aMessage)
  {
      return static_cast<const Coap::Message *>(aMessage)->GetCode();
  }
  
  const char *otCoapMessageCodeToString(const otMessage *aMessage)
  {
      return static_cast<const Coap::Message *>(aMessage)->CodeToString();
  }
  
  uint16_t otCoapMessageGetMessageId(const otMessage *aMessage)
  {
      return static_cast<const Coap::Message *>(aMessage)->GetMessageId();
  }
  
  uint8_t otCoapMessageGetTokenLength(const otMessage *aMessage)
  {
      return static_cast<const Coap::Message *>(aMessage)->GetTokenLength();
  }
  
  const uint8_t *otCoapMessageGetToken(const otMessage *aMessage)
  {
      return static_cast<const Coap::Message *>(aMessage)->GetToken();
  }
  
  otError otCoapOptionIteratorInit(otCoapOptionIterator *aIterator, const otMessage *aMessage)
  {
      return static_cast<Coap::OptionIterator *>(aIterator)->Init(static_cast<const Coap::Message *>(aMessage));
  }
  
  const otCoapOption *otCoapOptionIteratorGetFirstOptionMatching(otCoapOptionIterator *aIterator, uint16_t aOption)
  {
      return static_cast<Coap::OptionIterator *>(aIterator)->GetFirstOptionMatching(aOption);
  }
  
  const otCoapOption *otCoapOptionIteratorGetFirstOption(otCoapOptionIterator *aIterator)
  {
      return static_cast<Coap::OptionIterator *>(aIterator)->GetFirstOption();
  }
  
  const otCoapOption *otCoapOptionIteratorGetNextOptionMatching(otCoapOptionIterator *aIterator, uint16_t aOption)
  {
      return static_cast<Coap::OptionIterator *>(aIterator)->GetNextOptionMatching(aOption);
  }
  
  const otCoapOption *otCoapOptionIteratorGetNextOption(otCoapOptionIterator *aIterator)
  {
      return static_cast<Coap::OptionIterator *>(aIterator)->GetNextOption();
  }
  
  otError otCoapOptionIteratorGetOptionUintValue(otCoapOptionIterator *aIterator, uint64_t *const aValue)
  {
      return static_cast<Coap::OptionIterator *>(aIterator)->GetOptionValue(*aValue);
  }
  
  otError otCoapOptionIteratorGetOptionValue(otCoapOptionIterator *aIterator, void *aValue)
  {
      return static_cast<Coap::OptionIterator *>(aIterator)->GetOptionValue(aValue);
  }
  
  otError otCoapSendRequestWithParameters(otInstance *              aInstance,
                                          otMessage *               aMessage,
                                          const otMessageInfo *     aMessageInfo,
                                          otCoapResponseHandler     aHandler,
                                          void *                    aContext,
                                          const otCoapTxParameters *aTxParameters)
  {
      otError                   error;
      Instance &                instance     = *static_cast<Instance *>(aInstance);
      const Coap::TxParameters &txParameters = Coap::TxParameters::From(aTxParameters);
  
      if (aTxParameters != NULL)
      {
          VerifyOrExit(txParameters.IsValid(), error = OT_ERROR_INVALID_ARGS);
      }
  
      error = instance.GetApplicationCoap().SendMessage(*static_cast<Coap::Message *>(aMessage),
                                                        *static_cast<const Ip6::MessageInfo *>(aMessageInfo),
                                                        txParameters, aHandler, aContext);
  
  exit:
      return error;
  }
  
  otError otCoapStart(otInstance *aInstance, uint16_t aPort)
  {
      Instance &instance = *static_cast<Instance *>(aInstance);
  
      return instance.GetApplicationCoap().Start(aPort);
  }
  
  otError otCoapStop(otInstance *aInstance)
  {
      Instance &instance = *static_cast<Instance *>(aInstance);
  
      return instance.GetApplicationCoap().Stop();
  }
  
  void otCoapAddResource(otInstance *aInstance, otCoapResource *aResource)
  {
      Instance &instance = *static_cast<Instance *>(aInstance);
  
      instance.GetApplicationCoap().AddResource(*static_cast<Coap::Resource *>(aResource));
  }
  
  void otCoapRemoveResource(otInstance *aInstance, otCoapResource *aResource)
  {
      Instance &instance = *static_cast<Instance *>(aInstance);
  
      instance.GetApplicationCoap().RemoveResource(*static_cast<Coap::Resource *>(aResource));
  }
  
  void otCoapSetDefaultHandler(otInstance *aInstance, otCoapRequestHandler aHandler, void *aContext)
  {
      Instance &instance = *static_cast<Instance *>(aInstance);
  
      instance.GetApplicationCoap().SetDefaultHandler(aHandler, aContext);
  }
  
  otError otCoapSendResponseWithParameters(otInstance *              aInstance,
                                           otMessage *               aMessage,
                                           const otMessageInfo *     aMessageInfo,
                                           const otCoapTxParameters *aTxParameters)
  {
      Instance &instance = *static_cast<Instance *>(aInstance);
  
      return instance.GetApplicationCoap().SendMessage(*static_cast<Coap::Message *>(aMessage),
                                                       *static_cast<const Ip6::MessageInfo *>(aMessageInfo),
                                                       Coap::TxParameters::From(aTxParameters), NULL, NULL);
  }
  
  #endif // OPENTHREAD_CONFIG_COAP_API_ENABLE
  